OOB, Iran 2004

Landforces:

The Iranian army has about 350.000 active troops and 400.000 reservists.

Structure:
3 army HQs
4 mechanised divisions- each with 3 armored brigades, 1 mechanized infantry brigade and 4 to 5 artillerybattalions.
6 infantrydivisions- each with 4 infantry brigades and 4 to 5 artillery battalions.
1 independent airborne brigade
3 independent special forces units(up to a divison)
1 independent commando brigade
5 artillery groups
12 Hawk anti-aircraftbatteries.

The Iranian revolutionary guard corps

13 regional commands with:
4 armoured (tank) divisions
15 infantry divisions
5 independent infantry brigades
7 special forces groups
(note: the size of these formations can vary)

Equipment:

MBT
Zulfiqar (Iranian design) entering service.
This tank is armed with the common 125 mm gun found on most russian tanks
50 M60A1
100 Chieftain 1
100 T-62
200 T72S (T72 version with ERA)
350 T72 Z( modified T55 and T59 tanks)
50 Scorpion light tanks

Armored cars
EE-9 Cascavel
Ferret
Greyhounds
Fox

AIFV and APC's
200 BMP 1
a low number (unknown) of Boraghs (locally assembled BMP1 with 12,7 mm machinegun instead of 100 mm gun)
200 M113A1
320 BTR 40/50/60/152

Artillery
+2000 pieces total
75 and 85 mm
M101 105mm guns
122 mm guns
130mm towed guns
M114 towed guns
M109 SP guns
M 115 towed guns
M110  203mm guns
GHN and G5 towed guns
Mortars:
81/107 and 120 mm

MRLS
64 x BM21
FADJIR-3 Unknown number 203mm
FADJIR-5 unknown number 333mm
SSM:
300+ SCUD-B
60 SCUD-C

ATGW
TOW
DRAGON
ENTAC
SS11/12

AAA guns
1800+ guns
32/35/40/57/85 towed guns
ZSU23-4 and ZSU57-2 SP

SAM
HAWK
SA7
RBS70
MISAGH1( entering service)
Some STINGERS

Army Aviation
12 x F27 FOKKER
28 x CESSNA 185
6 x CESSNA 310
10 x CESSNA O-2
2 FALCON 20
5 AEROCOMMANDER 690
16 x PC6b
12 x AH-1j CObras
Bell 214
21 x MI17( being armed with STHURM ATGW)
unknown number MI8
40 x BOEING CH47
84 x AB2/206
7 x NAS 322 SUPERPUMAS

Source, military technology 2003